I don't stress about oil brand or grade

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Sep 1, 2008
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I don't stress on oil. Any name brand with a current API or Dexos or Ilsac certification is fine with me. I don't stress on viscosity, although I am well aware CAFE is the tail that wags the dog. I believe one viscosity grade up or down is almost neglible. Won't cause any harm.

Curiosity led me to make an informal observation with my 2019 RAM Classic with the 3.6L Pentastar V6, when I changed the fill from the 5w-20 dealership oil to 5w-30 SuperTech full Syn. After about 380 miles (just one tank) I observed the following from the trucks display:

5w-20 Coolant temp = 201 5w-30 Coolant temp = 197
5w-20 Trans temp = 183 5w-30 Trans temp = 181
5w-20 oil temp = 194 5w-30 oil temp = 194
5w-20 oil pressure = 41 5w-30 oil pressure = 44
5w-20 observed MPG = 21.4 5w-30 observed MPG = 21.2

My conclusion is the truck never noticed bumping up from 5w-20 to 5w-30. I seriously doubt I "lost" 0.2 mpg either, since this is reflective of just one tank (~380 miles) that had less highway crusing than I normally do. FWIW.
 
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Those engines could run on 15w40 and be fine. My daughter bought a dodge journey and it’s the only engine that withstood the daily abuse she put it through. Everything around the engine fell apart but the motor was fine.
 
When I switched mine to 5W30 - kept a close eye on oil pressure …
Same on the highway and still does stupid high stage oil pump engagement at a snails pace (until the engine is hot) …
 
My 2011 Chevy Equinox never notices what brand or weight oil I put in it either. I quit using gm's dexos recommended oil because it does nothing beneficial for the engine, which will use oil regardless whose dexos branded oil went in it. I bumped it up to 10w40 wt, and it dramatically cut oil usage. It was using a qt every 750 miles, and that went up to a qt every 1500 miles with 10w40 wt. I've been thinking the factory has been recommending the wrong wt oil for years in those early model years.,,
 
My 2011 Chevy Equinox never notices what brand or weight oil I put in it either. I quit using gm's dexos recommended oil because it does nothing beneficial for the engine, which will use oil regardless whose dexos branded oil went in it. I bumped it up to 10w40 wt, and it dramatically cut oil usage. It was using a qt every 750 miles, and that went up to a qt every 1500 miles with 10w40 wt. I've been thinking the factory has been recommending the wrong wt oil for years in those early model years.,,
I wonder if this would be a good trial for Valvoline R&P ?
 
Commodity blend 5W30 you are just tossing more % VM goo into the mix - and that is not oil. Logic says she is Gonna get dirtier faster.

OP smells like a no VM 20 grade candidate.
 
My neighbor doesn't either.
He buys used BMWs and usually has four in his lane. He takes them to 400 to 500k miles. He repairs them himself and is a mid 50 year old Lockheed Martin engineer.

At a Christmas party I notice he had a bunch of Vanilla grade Mobil 1 on the shelves in a few weights.

I asked him what BMW spec oil he uses. He doesn't, basic M1 and he said he doesn't do the approval thing. Never did and who could argue as his whole family drives them and they all get the basic but in the correct weight...
He is now into the used Mercedes market....going Vanilla...
 
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